Development of Experimental Devices for Tube Hydro-Forming

2011 ◽  
Vol 418-420 ◽  
pp. 1351-1354 ◽  
Author(s):  
Hai Song Rong ◽  
Lian Fa Yang ◽  
Xian Chang Mao
Keyword(s):  
Internal Pressure ◽  
Development Trend ◽  
Experimental Device ◽  
Test Device ◽  
Pressure Source ◽  
Working Principle ◽  
Tube Hydro Forming ◽  
The Development Trend

The exploitation of Tube Hydro-forming (THF) experimental device plays an important role on the development of THF technology. In this paper, some representative experimental devices are introduced, including device with outside pressure source and device with internal pressure source. The working principle, technical characteristics, sealing mode and pressurization way are compared and analyzed. Meanwhile, the development trend in exploitation of the test device is envisioned.

scholarly journals Summary of Research on Related Technologies of Ship Dynamic Positioning System

2021 ◽  
Vol 233 ◽  
pp. 04032
Author(s):  
Shuaiyang Wang ◽  
Xuanfang Yang ◽  
Zheng Wang ◽  
Liangkun Guo
Keyword(s):  
Development Trend ◽  
Dynamic Positioning ◽  
Positioning System ◽  
Paper Briefly ◽  
Fixed Position ◽  
Distribution Method ◽  
Dynamic Positioning System ◽  
Thrust Distribution ◽  
Working Principle ◽  
The Development Trend

Dynamic positioning means that the ship can resist the influence of wind, wave, current and other environmental interference through its own propeller without anchoring, so as to realize the maintenance of its fixed position or expected track on the sea surface, with the advantages of not limited by water depth, rapid input or evacuation, good mobility and accurate positioning. This paper briefly introduces the components, working principle and mathematical model of the ship dynamic positioning system; On this basis, this paper summarizes the research status of the control strategy, filtering and data fusion, thrust distribution method and other related technologies of the ship dynamic positioning system at home and abroad; Finally, the development trend of the above-mentioned related technologies is discussed, so as to provide reference for the research in this field.

Present Situation and Development Trend of Precise Wire Cutting Technology of Silicon Wafers

2010 ◽  
Vol 102-104 ◽  
pp. 762-766
Author(s):  
Hong Wen Du ◽  
Yuan Zheng Yu
Keyword(s):  
Rapid Development ◽  
Present Situation ◽  
Development Trend ◽  
Silicon Wafers ◽  
Machining Accuracy ◽  
Wire Cutting ◽  
Working Principle ◽  
The Development Trend ◽  
Free Abrasive

With the rapid development of IC and photovoltaic industry, the requirements of larger-diameter, better productivity, higher machining accuracy and finer surface quality of silicon wafers challenge traditional wafer cutting technology. Therefore, in terms of increasing wafers’ diameter, lessening slicing thickness, reducing cutting loss and improving machining efficiency, research and application of precision cutting technology become necessary and urgent. The paper analyzes current well-developed technologies and equipments of free abrasive wire cutting in detail. It is recommended that bonded abrasive diamond wire cutting will be the development trend in the future as a highly-efficient, low material waste and environmentally friendly technology of precise cutting of silicon wafers. The paper also makes a discussion on construction, working principle, and manufacturing technology of bonded abrasive diamond wires.

Review of Mechanical Structure of Force Actuator for Optical Astronomical Telescope

2013 ◽  
Vol 765-767 ◽  
pp. 25-28
Author(s):  
Yu Fang Zhang
Keyword(s):  
Development Trend ◽  
Mechanical Structure ◽  
Advantages And Disadvantages ◽  
Performance Requirements ◽  
Working Principle ◽  
Application Requirements ◽  
The Development Trend

Reviewed the application of force actuators in the optical astronomical telescopes, and introduced the working principle, mechanical structure, performance requirements and basic components of the force actuators; then compared the advantages and disadvantages of force actuator types which commonly used in astronomical telescopes, finally, propose a outlook of the development trend of the actuator on the great telescope application requirements.

Recent Patents on Flexible Fixture for Parts Machining

2020 ◽  
Vol 13 ◽  
Author(s):  
Chengyi Pan ◽  
Baocheng Xie ◽  
Xiaowei Ni
Keyword(s):  
Structural Design ◽  
Development Trend ◽  
Processing Quality ◽  
Processing Efficiency ◽  
Existing Problems ◽  
Working Principle ◽  
Different Shapes ◽  
The Development Trend ◽  
Structure And Design

Background: Flexible fixture is widely used in the diversification processing and personalized processing of parts. The research on the structure and working principle of flexible fixture is beneficial to improving the clamping efficiency and clamping stability of parts and enhancing the processing efficiency and processing quality of parts. Objective: To meet the growing demand for the processing of parts with different sizes and different shapes, the clamping stability and clamping efficiency of the fixture for the processed parts are continuously improved, and then the processing efficiency and the processing quality of parts have been improved continuously. Methods: This paper reviews various representative patents related to the structural device of flexible fixture for parts machining. Results: Through retracing the characteristics of different structural device of flexible fixture, the main existing problems in the structure and design principles of flexible fixtures are concluded and analyzed, and the development trend of flexible fixtures in structural design is discussed in the future. Conclusion: The optimization and development of the structural device of the flexible fixture is conducive to improving the processing efficiency and processing quality of the parts machining. More related patents on flexible fixture for parts machining will be invented.

Deformation Behaviors of Tube in Hydroforming with Radical Crushing

2014 ◽  
Vol 651-653 ◽  
pp. 1013-1016
Author(s):  
Xian Chang Mao ◽  
Hai Yan Lin
Keyword(s):  
Cross Section ◽  
Development Trend ◽  
Tube Cross Section ◽  
Research Status ◽  
Cross Section Shape ◽  
Section Shape ◽  
Deformation Behaviors ◽  
Working Principle ◽  
The Development Trend

Working principle and advantages of tube in hydroforming with radical crushing were described and introduced briefly. The research status of deformation behaviors of tube in hydroforming with radical crushing with the tube cross-section shape was made into triangle, rectangle or trapezoid were reviewed in this paper. Finally, the development trend and burning questions of tube in hydroforming with radical crushing were predicted.

scholarly journals The development trend of AC-style PDPs

1998 ◽  
Vol 82 (Appendix) ◽  
pp. 311-311
Author(s):  
Tetsuji Okajima ◽  
Chizuka Tani
Keyword(s):  
Development Trend ◽  
The Development Trend

scholarly journals Experimental Study on Wake Evolution of a 1.5 MW Wind Turbine in a Complex Terrain Wind Farm Based on LiDAR Measurements

2020 ◽  
Vol 12 (6) ◽  
pp. 2467 ◽  
Author(s):  
Fei Zhao ◽  
Yihan Gao ◽  
Tengyuan Wang ◽  
Jinsha Yuan ◽  
Xiaoxia Gao
Keyword(s):  
Wind Speed ◽  
Wind Shear ◽  
Wind Farm ◽  
Wind Farms ◽  
Field Measurements ◽  
Development Trend ◽  
Asymmetric Distribution ◽  
Lidar Measurements ◽  
Wind Characteristics ◽  
The Development Trend

To study the wake development characteristics of wind farms in complex terrains, two different types of Light Detection and Ranging (LiDAR) were used to conduct the field measurements in a mountain wind farm in Hebei Province, China. Under two different incoming wake conditions, the influence of wind shear, terrain and incoming wind characteristics on the development trend of wake was analyzed. The results showed that the existence of wind shear effect causes asymmetric distribution of wind speed in the wake region. The relief of the terrain behind the turbine indicated a subsidence of the wake centerline, which had a linear relationship with the topography altitudes. The wake recovery rates were calculated, which comprehensively validated the conclusion that the wake recovery rate is determined by both the incoming wind turbulence intensity in the wake and the magnitude of the wind speed.

Application of Ubiquitous Sensor Network in Collection and Analysis of CNC Machine Tool Processing Status Information

2010 ◽  
Vol 455 ◽  
pp. 621-624
Author(s):  
X. Li ◽  
Y.Y. Yu
Keyword(s):  
Machine Tool ◽  
Sensor Network ◽  
Machine Tools ◽  
Thermal Error ◽  
Development Trend ◽  
Cnc Machine Tools ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Status Information ◽  
The Development Trend

Because of the practical requirement of real-time collection and analysis of CNC machine tool processing status information, we discuss the necessity and feasibility of applying ubiquitous sensor network(USN) in CNC machine tools by analyzing the characteristics of ubiquitous sensor network and the development trend of CNC machine tools, and application of machine tool thermal error compensation based on USN is presented.

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